net: fq_codel: Fix off-by-one error

[ Upstream commit cd68ddd4c29ab523440299f24ff2417fe7a0dca6 ]

Currently, we hold a max of sch->limit -1 number of packets instead of
sch->limit packets. Fix this off-by-one error.

Signed-off-by: Vijay Subramanian <subramanian.vijay@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 4e606fcb2534929a2470e807816ac1089d81b7b2..55786283a3dfe613ee6deac5756b4726a66925ee 100644 (file)
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -195,7 +195,7 @@ static int fq_codel_enqueue(struct sk_buff *skb, struct Qdisc *sch)
                flow->deficit = q->quantum;
                flow->dropped = 0;
        }
-       if (++sch->q.qlen < sch->limit)
+       if (++sch->q.qlen <= sch->limit)
                return NET_XMIT_SUCCESS;
 
        q->drop_overlimit++;